Software and service provider Boingo Wireless today revealed a deal with AT&T allowing global roaming data subscribers to use Boingo’s network of Wi-Fi hotspots globally. By way of the AT&T Wi-Fi Internataional App, users can locate and sign into the network operated by Boingo’s subsidiary, Concourse Communications Group. The AT&T Wi-Fi International app is available to AT&T customers who subscribe to either the 300MB or 800MB AT&T Data Global Add-On package. Pay-as-you-go or other data cap packages are ineligible for the offering….